First Aired: Jun. 19, 2005 on FOX
Summary: After Peter wins a game of Trivial Pursuit, he is convinced he is a genius. Brian tries to bring him down to earth by telling him to take the MacArthur Genius test. Not only does the test prove he's not a genius, but it turns out he is mentally challenged. He has a good time taking…
Main Characters in this Episode
Peter Griffin: Joe, I just, umm... just recently found out that I'm umm... I'm mentally retarded, and umm... I just wanted to ask, umm... h-how do you deal with it?
Joe Swanson: Peter, I'm handicapped, not retarded.
Peter Griffin: Okay, now we're splittin' hairs.
- The character Vern (Peter's social worker) is based on the character Vern (played by Micheal D. Roberts) in Rain Man (1988). In this film, Vern is a supportive worker at Raymond's (Dustin Hoffman) asylum, and says the line "I'm your main man Raymond, I'm your main man."